Gamma-ray bursts shed light on the composition of early galaxies

Gamma-ray bursts shed light on the composition of the early galaxies Scientists prove

A team of astronomers studied the light from the gamma-ray bursts GRB 090323, to understand the chemical composition of the two galaxies, young universe. Observations made with the ESO VLT European Southern Observatory experts found that these galaxies are rich in heavier chemical elements than the sun.

The light from the flash GRB 090323 was a parent and a neighboring galaxy. Some colors are usually absorbed by the cold gas around galaxies, leaving a characteristic dark lines in the spectrum. Thanks to gamma-ray bursts GRB 090323, the

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Russian physicists have created a tabletop particle accelerator

The energy of the particles in this case can reach tens of MeV per nucleon, which is comparable with the energy of a small accelerator. A beam of particles can be used as initiators of a thermonuclear reaction in plants with inertial controlled thermonuclear fusion, as well as for short-lived isotopes for nuclear medicine or proton radiotherapy.

In a paper published in journals such as Physical Review E, Physics of Plasmas, Bochkarev and his colleagues described their mathematical models to accelerate the ions and electrons in the interaction of a femtosecond laser pulse with the gas

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Russian scientists have developed a microsatellite to study thunderstorms

Microsatellites called spacecraft weighing from 10 to 100 kilograms. According to Lev Zeleny, director of the Space Research Institute (IKI) of the Russian Academy of Sciences, the fashion for such devices is not random. They allow significant savings in the performance of tasks serious level. One microsatellite in the SRI have already run in 2000 — an educational satellite "Hummingbird", weighing 20 kilograms. Now the institute are working on a similar new machine — "Chibis-M". Despite the prefix "micro" tasks to perform which it was designed, more than serious. Central of them — testing the hypothesis of occurrence

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Russian Cone recorded gamma-ray bursts in space

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MOSCOW, September 27 — RIA Novosti. The brightest gamma-ray bursts, the duration of which was a few tens of seconds, was registered on September 18 by several spacecraft, including the Russian instrument "cone" on board an American satellite "Wind," the statement on the website of Roscosmos.

Gamma-ray bursts — one of the most extraordinary and enigmatic astrophysical phenomena. They are a short-term sporadic cosmic gamma rays coming in all directions from the depths of space.

"The US-Russian space experiment performed detailed studies of a unique gamma-ray burst GRB 110918A. The brightest flash hard electromagnetic radiation, the

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The black hole at the center of our galaxy with unprecedented force destroys a lot of asteroids

Astronomers have discovered the British and Dutch in the center of Milky Way supermassive black hole, with a supernatural intensity scathing in its bosom asteroids, said on Wednesday the Jet Propulsion Laboratory (JPL) NASA in Pasadena (California), transfers DV-ROSS.

This is indicated by recent data from the board of the orbiting observatory NASA «Chandra" which registered a significant increase in the frequency of X-ray bursts in the vicinity of the mysterious space object (black hole). JPL outlined the main provisions of a study conducted by astronomers Britain and Holland. They drew attention to the fact that during the last years

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Land threatened deadly cosmic rays

American astrophysicists have concluded that the Earth is threatened by a new threat from outer space — a special type of gamma radiation, which can destroy all life on our planet. Scientists suggest that these "death rays" have killed the dinosaurs. This is reported by the U.S. media.

Threatening Earth, gamma rays produced by collisions of stars and supernova explosions. As a result there are so-called short gamma-ray bursts. How do I find the staff Uoshbernskogo university in the state of Kansas, this type of radiation was more dangerous than the long gamma-ray bursts.

These pulses last less than a

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Astrophysics: external gamma rays harm the planet

October 8. Space — a cozy place. If a star explodes or black holes collide anywhere in our part of the Milky Way, they will create huge explosions, deadly gamma rays, X-rays, cosmic rays. Several studies have recently shown a higher power, such as supernova explosions and extreme solar flares can deplete the ozone layer, allowing ultraviolet radiation to penetrate to the surface of the Earth. This is enough to destroy life on earth or in the ocean. "We find that the short gamma-ray burst is even more significant large gamma-ray burst" — said astrophysicist Brian Thomas. The accumulated data

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The powerful flash of gamma

Orbiting Fermi gamma-ray telescope (FGST) caught unusually distant gamma-ray bursts, whose power has broken all previous achievements of these cosmic explosions. Scientists say that some of its features make for a fresh look at the discussed current theory of gravity.

Flash GRB 080916C observed in the constellation Carina September 16. In addition to catch her first FGST this phenomenon had to consider a number of other orbiting and ground-based instruments. But now, the details became known, writes sunhome.ru

Distance from us to the source of radiation was a whopping 12.2 billion light years. Energy gamma-ray emission in this

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Earth threatens gamma radiation from the explosions of distant stars

Recent research astrophysicists argue that life on Earth can break the gamma-ray bursts, resulting from the collapse of stars. This theory explains not only the numerous mass extinctions on our planet, including dinosaurs, but even then, why do we still have not heard signals from the brothers on reason. For a long time, the main threat from outer space, asteroids and comets were considered. Governments of major world powers for some time even began to develop programs to prevent collisions with the Earth large celestial bodies. However, staff at the University of Kansas Uoshbernskogo recently presented a report saying that

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Russian scientists have documented the radiation from an unknown space object

17.08.2004

17.08.2004

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Russian scientists have recorded one of the most unusual gamma-ray bursts from an unknown space object. In their view, this discovery may change the current view of the universe.

The discovery was made on the basis of the analysis of data from orbiting observatory "Integral" in

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